1620386145287 has 32 divisors (see below), whose sum is σ = 2000057754240. Its totient is φ = 1278378178560.

The previous prime is 1620386145277. The next prime is 1620386145293. The reversal of 1620386145287 is 7825416830261.

It is not a de Polignac number, because 1620386145287 - 2⁸ = 1620386145031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620386145247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186654587 + ... + 186663267.

It is an arithmetic number, because the mean of its divisors is an integer number (62501804820).

Almost surely, 2^{1620386145287} is an apocalyptic number.

1620386145287 is a deficient number, since it is larger than the sum of its proper divisors (379671608953).

1620386145287 is a wasteful number, since it uses less digits than its factorization.

1620386145287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14363.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 1620386145287 in words is "one trillion, six hundred twenty billion, three hundred eighty-six million, one hundred forty-five thousand, two hundred eighty-seven".